Chapter 8 Troubleshooting
8-2
8-1 Points of caution and confirmation
If an error occurs in the servo system, the servo warning or servo alarm will occur. When a servo
warning or alarm occurs, check the state while observing the following points, and inspect or remedy
the unit according to the details given in this section.
<Points of confirmation>
1. What is the alarm code display?
2. Can the error or trouble be repeated? (Check alarm history)
3. Is the motor and servo amplifier temperature and ambient temperature normal?
4. Are the servo driver, control unit and motor grounded?
5. Was the unit accelerating, decelerating or running at a set speed? What was the speed?
6. Is there any difference during forward and backward run?
7. Was there a momentary power failure?
8. Did the trouble occur during a specific operation or command?
9. At what frequency does the trouble occur?
10. Is a load applied or removed?
11. Has the amplifier unit been replaced, parts replaced or emergency measures taken?
12. How many years has the unit been operating?
13. Is the power voltage normal? Does the state change greatly according to the time band?
LED display during servo alarm
LED display during servo warning
CAUTION
1. This servo amplifier uses a large capacity electrolytic capacitor. When the
CHARGE lamp on the front of the driver is lit, there is still a voltage in the
unit. Take care to prevent electric shocks and short circuits. (The voltage
will remain for several minutes after the power is turned OFF.)
2. The conductivity in the amplifier cannot be checked due to the structure.
3. Do not carry out a megger test as the amplifier could be damaged.
F1 (flicker)
F + axis No.
37 (flicker)
larm No.
Not lit
F1 (flicker)
F + axis No.
37 (flicker)
larm No.
9F
Warning No.
F1
F + axis No.
F1
F + axis No.
9F
Warning No.
Not lit
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